I heard Messenger of Allah ﷺ as saying: One is not strong because of one's wrestling skillfully. They said: Messenger of Allah, then who is strong? He said: He who controls his anger when he is in a fit of rage.
سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ لَيْسَ الشَّدِيدُ بِالصُّرَعَةِ قَالُوا فَالشَّدِيدُ أَيُّمَ هُوَ يَا رَسُولَ اللَّهِ قَالَ الَّذِي يَمْلِكُ نَفْسَهُ عِنْدَ الْغَضَبِ